更改管理字段筛选器名称Django 1.7模型管理员列表

Question

基本上，我尝试为我的过滤器字段创建自定义名称，因为原始数据库值没有太多含义。当前值为0、1和？。我在这里遵循了Django管理指南https://docs.djangoproject.com/en/1.10/ref/contrib/admin/部分ModelAdmin.list_过滤器. 在

以下是我的代码：

@admin.register(AuditPolicies)
class AuditPoliciesAdmin(admin.ModelAdmin):  
    list_filter = ('PolicyComparisonFilter',)


class PolicyComparisonFilter(admin.SimpleListFilter):
    title = _('Policy Comparison')
    parameter_name = 'SourceState'

    def lookups(self, request, model_admin):
        """
        Returns a list of tuples. The first element in each
        tuple is the coded value for the option that will
        appear in the URL query. The second element is the
        human-readable name for the option that will appear
        in the right sidebar.
        """
        return (
            ('0', _('No Match')),
            ('1', _('Match')),
            ('?', _('Missing')),
        )

    def queryset(self, request, queryset):
        """
        Returns the filtered queryset based on the value
        provided in the query string and retrievable via
        `self.value()`.
        """
        # Compare the requested value (either '80s' or '90s')
        # to decide how to filter the queryset.
        if self.value() == '0':
            return queryset.filter(SourceState__gte = '0')
        if self.value() == '1':
            return queryset.filter(SourceState__gte = '1')
        if self.value() == '?':
            return queryset.filter(SourceState__gte = '?')

我的模型（数据库）中的几行：

^{pr2}$

我的数据库模型：

class AuditPolicies(models.Model):
    ComparisonDate = models.DateTimeField(default=datetime.now(), blank=True)
    Source = models.CharField(max_length=32, blank=True, null=True)
    SourcePolicyName = models.CharField(max_length=64, blank=True, null=True)
    SourcePolicyPath = models.CharField(max_length=128, blank=True, null=True) # todo: check if this should be using models.SlugField()
    SourceState = models.CharField(max_length=2, blank=True, null=True)

    Target = models.CharField(max_length=32, blank=True, null=True)
    TargetPolicyName = models.CharField(max_length=64, blank=True, null=True)
    TargetPolicyPath = models.CharField(max_length=128, blank=True, null=True)
    TargetState = models.CharField(max_length=2, blank=True, null=True)

    class Meta(object):
        verbose_name_plural = "Audit Policies"

我尝试运行Django时遇到的错误是：

ERRORS:
<class 'policy_manager.apps.policy.admin.AuditPoliciesAdmin'>: (admin.E116) The value of 'list_filter[0]' refers to 'PolicyComparisonFilter', which does not refer to a Field.

我要做的是更改下面红色框中的值：

Answer 1

我觉得你的第三行应该是这样的：

list_filter = (PolicyComparisonFilter, )

没有引号。在